Mixing apparatus



Sept. 30, 1930. 4 KNOWLES MIXING APPARATUS Filed NOV. 23, 1928 ATTORNEY.

Patented Sept. 30,1930

minor PATENT caries ALBERT nowmis, 01! SAN IRAN C1800, CALIFORNIA MIXING nrran'n'rus Application filed November 28, 1928. Serial No. 821,810.

'It has been found desirable under certain structural conditions, in the formation and repair of highways and other ways necessitating a hard surface, to employ hot oil macadam and heated asphalt in the construction of the way.

It is the present practise to construct mixing plants for the asphalt and hot oil macadam and to convey, 'in suitable trucks, batches from the plant to the point of use.

This conveying has many objections, the principal one being that the oil macadam cools during its transportation, and when arriving at the point of use is required to again .be heated, which operation is costly, or if laid in its condition of arrival, fails, due to temperature, to set, and form a homogeneous mass.

v The present invention relates to an apparatus designed particularly for transporting oil macadam and asphalt and maintain the same heated during its transportation so that it will be delivered to its point of use in its maximum state of binding efliciency; also to an apparatus adapted for transporting a concrete aggregate mix in cold weather and to maintain the temperature thereof during its transportation, such as to enable the concrete to be readily poured and set and delivered to its oint of use.

he invention consists in the mixing or agi tating member, preferably'of the rotating cylinder'type, the surface of which is heated by suitable self contained burner mechanism, the heat passing over the surface of the cylinder;

there being also provided, if desirable, a shell or shield surrounding the cylinder to confine the heat to the surface thereof, together with means for-rotating the cylinder, and means, if desirable, for supplying fluid, whether it be water or hydrocarbon to the aggregate contained within the cylinder.

With the above mentioned and other objects in view, the invention consists in the novel construction and combination of parts hereinafter described,'illustrated in the 'acand pointed out in the claims hereto appen ed; it being. understood that various changes in the form, proportion,

-20 through valve controlled. line 21.

size and minor details of construction within the scope of the claims may be resorted to without departing from the spirit or sacrificin any of the advantages of the invention.

0 more clearly comprehend the invention, 5: reference is directed to the accompanying drawings, wherein- Fig. 1 is a View in side elevation of the preferred embodiment of my invention, illustrated in inclined dum ing position on the chassis ofa transit mem er.

Fig. 2 is a' vertical sectional view on line 2-.2 of Fig. 1. In the drawings, wherein like characters of reference indicate corresponding parts, 1

designates the frame of a truck chassis; 2 the gear box and 3 a power take-off associated with the mechanism on the interior of the gear box. An auxiliary or sub-frame 4 fulcrums on an axis 5 at the rear of the frame 1, 7

and the same mounts a cylindrical shell 6 interiorly of which is supported on brackets 7 the rings 8, each carrying anti-friction devices 9. The anti-friction devices afford supporting means for a mixing cylinder or drum 1O rotatably mounted within the rings 8. The

cylinder. or drum 10 is preferably closed at its 7 I forward end and is illustrated as formed with a conical discharge 11 at its rear end. the discharge being controlled by a gate 12.

On its interior, the cylinder or drum 10 is provided with mixing blades 13 which cause anagitation of the material contained Within the cylinder when the latter is rotated.

On its periphery the cylinder mounts a toothed ring 14 with which engages a pinion 15 on the shaft 16 which pivots with the frame 4,.the shaft being driven from the power take-off driven shaft 17 through a gear mechanism 18,

Extending parallel with the walls of the cylinder or drum 10, one preferably at each side of a line extended vertically through the cylinder or drum, are the perforated burner pipes 19 supplied with fuel through a t ii rlilk e tank 20 is preferabl ositioned transversely of and above the s ell 6 so that the liquid hydrocarbon contained therein will be maini the material transported, they preferably containing liquid hydrocarbon, should an oil macadam or asphalt be transported, and water, should cement or concrete aggregate, either wet or dry, be transported.

It will be apparent that by controlling the burners 19, the temperature of the cylinder or drum 10 may be varied, at will, and the heat from the burners is confined around the surface of the shell or drum 10 by the casing 6. a

t is to be understood that suitable mechanism, not shown, is provided for raising and lowering the cylinder on its pivotal mounting, This forming no part of the invention, it is not described or illustrated herein.

I claim 1. A heated mixing apparatus comprising an elongated axiall rotated cylinder provided at one end wit an inlet and dischar e, means for rotating the cylinder, means or tilting the cylinder on an axis at right angles to its axis of rotation to dumpthe contents therefrom through said discharge, a liquid fuel burner extending beneath the cylinder held from rotation and tiltable with the cylinder, and a liquid fuel tank connected with the burner-and held from rotation with the cylinder. 7

2. A heated mixing'apparatus comprising an elongated axially rotated cylinder provided at one end with an inlet and discharge, means for rotating the cylinder, a liquid fuelburner disposed longitudinally of and beneath the cylinder for heating the surface thereof, a shell embracing the cylinder and between which and the surface of the cylinder the heat from the burner rises, and a liquid fuel tank connected with the burner and carried by the shell for heating thereby.

3. A heated mixing apparatus comprising an elongated axially rotated cylinder provided at one end with an inlet and discharge, means for rotatin the cylinder, a shell embracing the c lin er and held from rotating therewith, a liquid fuel burner positioned between the shell and c linder, a liquid fuel tank connected with t e burner, and means for supporting the cylinder, shell, burner and fuel tank and tiltable on an axis transverse to the axis of rotation of the cylinder.

4. A heated apparatus comprising a ro- V tatably mounted cylinder provided at one end with an inlet and discharge, a frame supportin the cylinder, means for rotatin the cylin er,a liquid fuel burner disposed longitudinally beneath the cylinder, a shell shell fixe embracing the cylinder and affording a heat confining space surroundin the cylinder and within which the burner 1s located, means for tilting the frame, and a li uid fuel tank connected with the burner an tiltable with the cylinder.

5. A heated mixing apparatus, comprising a rotatabl mounted cylinder havin an inlet and discharge opening'at one en thereof, means for rotating the cylinder, a shell embracing the cylinder and held from rotating therewith, a liquid fuel burner positioned between the shell and cylinder, a liquid fuel tank connected with the burner and rigidly secured to the shell, a fluid. storage tank rigidly secured to said shell and communicating with the interior of the cylinder, and means for dumping the contents of said cylinder.

6. A heated mixing apparatus, comprising a frame, a shell fixed to said frame, annular support means ri 'dly secured to the inner walls of said sheli a mixing cylinder rotatively mounted in said support means and provided at one end with an inlet and discharge opening, means for rotatin the cylinder, a liquid fuel burner dispose 1ongitudinally beneath the cylinder between the latter and the shell, a liquid fuel tank'connected with the burner and straddlingsaid shell in fixed relation thereto, and means for dumping the contents of the mixing cylinder.

7. A heated mixin apparatus, comprising a frame, a shell xed to said frame, a series of rings rigidly secured to the inner Walls of said shell, anti-friction devices mounted upon said rings, a mixing cylinder rotatably mounted within the rin and supported by said anti-friction devices, means for rotating the cylinder, a liquid fuel burner disposed within the shell and extending beneath the cylinder, and a liquid fuel tank carried by said shell, and connected with the burner.

8. The combination in; a, heated mixing and trans o'rting apparatus, of a frame, a

d to said frame, annular su port means ri idly secured to the inner wa ls of said shel a mixing and transporting cylinder rotat-ively mounted within said su port means and having an inlet and disc ar e opening at one end, means. for rotating t e cylinder, and means for heating the same.

In testimony whereof I have signed my name to this specification.

- ALBERT KNOWLES. 

